         (:url m) (conj (str "URL=" (:url m)))
         (:species m) (conj (str "species=\"" (:species m) "\""))
         (:taxonomy m) (conj (str "taxonomy=" (:taxonomy m)))
-        (:idx m) (conj (str "idx=" (:idx m))))
+        (:idx m) (conj (str "IDX=" (:idx m))))
       (pack-meta-info m [:id :length :assembly :md-5 :url :species :taxonomy :idx])))
 
 (defn- stringify-meta-info-info

       (str "Type=" (nil->dot (:type m)))
       (str "Description=\"" (:description m) "\"")]
      (cond->
        (:idx m) (conj (str "idx=" (:idx m))))
      (pack-meta-info m [:id :number :type :description :idx])))

(defn- stringify-meta-info-alt

  (-> [(str "ID=" (:id m))
       (str "Description=\"" (:description m) "\"")]
      (cond->
        (:idx m) (conj (str "IDX=" (:idx m))))
      (pack-meta-info m [:id :description :idx])))

(defn- stringify-meta-info-format
